𝑑 𝑑𝑠 (𝑛 𝑑𝑥 𝑑𝑠 )= 𝜕𝑛 𝜕𝑥 𝑑 𝑑𝑠 (𝑛 𝑑𝑦 𝑑𝑠 )= 𝜕𝑛 𝜕𝑦 𝑑 𝑑𝑠 (𝑛 𝑑𝑥 𝑑𝑠 )= 𝜕𝑛 𝜕𝑧

Example : Invisible Cloak? I would like to start my talk with a simple question. Q:in the nature, Is there any material which make an object to be invisible like magic cloak in the movie harry potter ? No natural metaterials can do…

Question Question Answer Maxwell’s equation is preserved

However, when the transformation is a conformal mapping, Q :Scale factor However, when the transformation is a conformal mapping, ε and μ are scalar

Invisible Cloak Sphere Cloaking Cylinder Cloaking

Invisible Cloak

Invisible Cloak First demonstration of Invisible cloak 실재 D. Schurig et al., Science 10, 977 (2006)

Invisible Cloak If we can control refractive index of material freely Transformation optics If we can control refractive index of material freely ……. Nature Mat. 2009 If we can controlled refractive index of material freely, we can make invisible cloak, because we can manipulate the Space and Time in the viiew point of light wave with the refrative index. Metamaterial can do it…